Hi Carlosm. Sorry I haven't replied haven't had internet in a while... well a long time :). My tank is cool, but I would recommend a slightly bigger sump/compartment box in the back like that of the BUOY NANO. Mine is a bit small. My nitrates are also very high cause the thank is so small :(. I would go for a larger tank maybe 150litre or greater. Have u got a tank already?